I am turning 40 this year, I have personally gone through this in the last couple of years. I do manage a fairly large team and still code, there are lot of distractions. Few changes helped me to keep coding, I went away from dual monitor to single monitor when I wanted to code, it helped me from not getting distracted. Setting up focussed time for coding also helped and its usually sitting in library. Putting phone or any notifications on the laptop to Going for a run or exercising before I start coding helped to clear my head and focus on coding.
I like to take notes with Pen and Paper during meetings, this gives me high recall. I keep scribbling even during zoom video meetings, it helps me to stay focused and not lose my train of thought if I have to refer back to it later. I have tried Apple Pencil with Ipad, but personally prefer pen and paper.